Model studies related to the cofactor of oxomolybdoenzymes. Part 4. Reduction of the pyrazine ring in quinoxalines and pteridines

Abstract

Reduction of quinoxalines and pteridines with sodium borohydride or sodium cyanoborohydride in the presence of benzyl chloroformate gives N-benzyloxycarbonyl- or N,N′-bisbenzyloxycarbonyl tetrahydro derivatives.